VINCE

iTrader: (1)

I am curious to how many have to keep cleaning the valve covers? I have a Catch Can and a breather on my valve covers, but after spirited driving I have to clean the valve covers and the breather with brake cleaner. If I dont clean the breather after a while I get smoke from the oil mist hitting the manifold. Am I just being too picky? I have a twin turbo 408ci setup..

Schantin

iTrader: (6)

I get the same thing, but my breather is on the inlet side of the catch can. Ends out dripping on the paint by the fusebox and looks like a$$. Thinking of building a shruod to catch the drips.

mdhmi

iTrader: (1)

I get a little misting, but usually only at the track. I have an AMW catch can and a valve cover breather. I haven't had any smoking. I spoke with a few other people and this sounds like pretty common fair for turbo LS1's at our power level.

turbo-max

if your vette was as weak as your supra,there'd be no leaks!

blacksi

iTrader: (3)

I added a second breather (one on each cover) and that fixed it for me. With just one it would mist and drip all over.

theblur98ss

iTrader: (71)

This was brought up before and someone puts some rough carpet like material in their breather and it cut the mist way down. I'm thinking it was a fish tank filter that they cut up.

RW99

My breather smokes a bit when the car goes WOT. Not much residue at all, surprisingly.

quicksilverado

iTrader: (8)

Put a wrist band over the breather. It will catch the mist and keep things clean. I change the wristband every 4-6 weeks or about 3k miles.

VINCE

iTrader: (1)

That's a good idea! It should still be able to breath right? I might add another breather on the other cover as well..

marlowchris

A little blow by is normal on a boosted engine, but if it gets worse then your rings may be wearing out. If the oil really bothers you, you can route a line from the valve cover into a vented catch can. The oil mist will stay in the can.

DanZ28

iTrader: (5)

Ditto!

I"m going to be running breather cans, one off each VC, but most should be fine with one. I see alot of guys have a -12 bung welded on their VC and run a breather can to a convienent location.

Z06PSI

iTrader: (33)

In this setup where is your fresh air coming from?

DanZ28

iTrader: (5)

Race car myself, I change the oil alot.

If I read this right, I see alot of folks running a PCV and a breather, now you no longer have a vaccum in the engine at idle, makes that part of the PCV kind of useless I would imagine. I'm guessing you would get your fresh air from the VC to TB still though right?

barnat

iTrader: (59)

i bough some breathers and the tubes from GM myself and i gotta say they looked the part for keeping oil out of the breather LOL!!exspensive little bastards they were LOL!!I bought em to go with my LS GM performance valve covers that say chevrolet across the middle of em and had em powder coated red and wiped off the red from the letters before baking ,then cleared and baked again They look bad ***!! I will try and post pics tomorrow Anyways back to the breathers LOL They even have the bow tie stamped into the tops of em

VINCE

iTrader: (1)

Mine is not getting worse. Just pushing the car more and noticing more oil mist. My driver side valve cover is run to my catch can. I only notice a lot of mist when I slack on cleaning the breather. When I clean it the mist decreases until the breather fills up with oil itself. My breather has a screen at the bottom to stop the oil from dropping back down. It accumulates and causes more of a oil mist.

Pro Stock John

iTrader: (34)

My Formula has had breathers on the valve covers for years, from when it was NA to SC to now turbo. Always has mist after a spirited pass regardless of which engine and combo was in there. I have some catch cans I have to dig out and install. Having oil mist onto hot parts and smoke kinda bothers me.

VINCE

iTrader: (1)

I know exactly what you mean. I am going to try the wrist band trick first.

theblur98ss

iTrader: (71)

https://ls1tech.com/forums/showthrea...light=breather

there is a thread with a similer question

HUNTER02SS

iTrader: (24)

I have the chevrolet covers as well and the breather hole sits on top of the rocker arm and it spits oil out the hole. I have to get baffles installed and hopefully that will help, but it dosn't sound like.

dredoggy

iTrader: (2)

just a thought, but the hose that goes to the throttle body from the pass valve cover on boosted aplications, couldnt that be creating pressure to the bottom end under boost? since under normal driving it sucks air out of there so under boost it could be pressurized and maybe thats why some people blow the rear main. thats why sts turns that hose off under boost. that could be why some get the mist to. am i right on this?